Custom size filters in larger volumes are typically packaged in Gel-Pak, Vacuum-ReleaseTM (VR) Gel-Pak, or multi-cavity PetG trays dependent on the part size, thickness and quantities. Filters packaged in standard 2″ x 3″ Gel-Pak can be removed using plastic-tipped tweezers. Filters packaged in either 4″ x 4″ or 6″ x 6″ VR Gel-Pak require the use of a vacuum release system prior to removing filters using plastic-tipped tweezers. Visit the Vacuum-Release Gel-Pak page for more information on the vacuum release system.